Online PHP editor | refs for VB0jr

<?php $history = new \stdClass(); var_dump($history->tier->name ?? 'Unknown Plan'); $history->tier = new \stdClass(); var_dump($history->tier->name ?? 'Unknown Plan'); $history->tier->name = null; var_dump($history->tier->name ?? 'Unknown Plan'); $history->tier = null; var_dump($history->tier->name ?? 'Unknown Plan'); $history->tier = 42; var_dump($history->tier->name ?? 'Unknown Plan');